大方廣佛華嚴經疏 25.8

25.8

Second, from "At that time" onward, clarifies ascending without departing, meaning that the four assemblies in all places of the ten directions are all solemnly intact without dispersing, yet he ascends to this exposition, intending to show that it horizontally pervades the ten directions and vertically encompasses the nine assemblies, because the Buddha's body of the dharmadhātu pervades time and place. The other meanings are fully as in the beginning of the third assembly.